First off, great threads guys. Lots of fine info and OP knows his stuff.
I'm an old fart but after a military career and a life of working out and playing a variety of sports at a high level, I pretend to know a lot about fitness. One of the confusing things that I've always been skeptical about is the sports supplement industry. I admit to being a sucker and trying a variety of products for over 20 years with varying results, but there always seems to be conflicting info showing up. I listened to a show on sports radio last night with a research scientist who had some interesting new info and tips about sports supplements. I thought I'd share.
First off, don't trust product hype. Any of the "test lab" results is usually from the company that is trying to sell the product. They are not necessarily lying, but they pick and choose the positive info that is going to help sell the product. Any info that fails to confirm or disproves claims is conveniently ignored. Some of this stuff has been tested for years by scientists and doctors who are doing real research and medical biopsies to actually learn how the body works. They're not trying to sell product, so I'll have a lot more confidence in scientists than I would with salesmen. A few specifics I've recently learned and some of the my personal experiences with sports supplements...
Creatine. Extensively tested and basically safe, but I never had any success with it and never found any difference. Was I doing something wrong? I recently found out that creatine has no effect on 40% of males, so I must be one of those. There's still conflicting reports about how effective it really is so I suppose it depends on your personal success, but for me it's a complete waste of money.
Glutamine. When I hit 40, DOMS really hit hard. That's Delayed Onset Muscle Soreness, and damn, I hurt for a couple of days after an intense workout. So making sure that I'm getting enough post workout protein and specifically glutamine is supposed to help with this. Again, I basically had no success with these post workout cocktails featuring the amino acids that claim to help. Same recommendation. Depends on your personal success but I'm leaning toward it being a waste of money.
Nitric Oxide. Claims to be a vasodilator and "pump up" muscle volume, but that doctor last night wasn't very positive about this stuff. Yes, it helps oxiginate blood, but it's been proven that NOX does nothing specific to muscle and most all of these supplements contains sub-products that can actually harm cardiac function. Until more is learned and these products are cleaned up, they should be avoided.
Thermogenics. Mostly caffeine, ephedra, and other stimulants and diet products. Not really harmful unless you've got a blood pressure problems, and caffeine has been proven to aid in blood flow to muscles. There are some expensive cocktails out there but basic caffeine pills are cheap. Hell, just have a cup of coffee before a workout and save even more.
Testosterone Boosters. There's Trubulis, ZMA, and anti-estrogen products claiming to increase testosterone, but all of it has never been proven to do this. Label claims are very questionable, so I'd throw this stuff into the wasted money bin.
Protein powder. Here's the biggie. It's good if used properly and there are a few pointers I've recently learned. Don't take whey protein BEFORE a workout. It sends mixed messages to the brain. Using muscles requires carbs, repairing muscle require protein, so ingesting protein before a workout sends the wrong message and effects performance. It's been mentioned many times here and can't be emphasized enough, but post workout whey protein is absolutely essential. 20 minutes max, get that protein in ya. Sports drinks are good for workouts (for the potassium not calcium and watch the calories) but don't buy sports drinks with protein.
What's the best type of protein? Whey, meat, or eggs? They all come with a catch, but it's eggs. Here's the egg catch. Raw egg white protein doesn't synthasize properly, so don't drink raw egg and make sure it's fully cooked. No runny eggs, and eat the whole egg. The amount of cholesterol in yolk is negligable and is also needed to properly digest the protein. It's OK to supplement with just egg white, but some yolk is needed. Just eat the whole damn egg. Egg protein powder is really expensive, real eggs are cheap. Guess what I recommend.
Meat is also the obvious source of protein, but the calories and cholesterol is a concern. Lean cuts, trim that fat, and eat in moderation. Carbs are really getting a bad rap lately. Chicken Little is screaming "makes you fat!" but the right type of carbs are essential. Low glycemic carbs in fruits and vegetables are needed to digest protein, so don't eat just meat in any meal.
And low glycemic carbs are also essential in synthasizing whey protein. Some claim to be zero carb. Don't buy! You need carbs. Also, don't forget that whey protein is fast digesting so don't mix with milk for post workout. Casein protein is also fabulous, just slow digesting for a continuous source of amino. Learn to love cottage cheese. It's probably the best food you can eat.
I think buying a basic cheap whey is good for post workout but I mostly use a blend. Pure casein is damn expensive so a blend like Myofusion is my preference. I've stopped buying the rest of these supplement products because I really question their effectiveness. I think that money is better spent buying quality, real food.
Sorry, no links and mostly just my opinion and experience, so take from it what you want. Most of this info has already been talked about so I'm just stating the obvious for emphasis. Again, great threads and workout knowledge is your friend.